An integrally formed 3D printed oil pressure tool holder

Abstract

The utility model relates to numerical control processing tool, concretely is a kind of integrally formed 3D printing oil pressure tool holder. The purpose is to provide a kind of integrally formed 3D printing oil pressure tool holder, the tool holder has the function of high-precision clamping, also has the advantages of high structural strength, excellent sealing performance and long service life. Technical scheme is a kind of integrally formed 3D printing oil pressure tool holder, including body;The body is equipped with the cylindrical cavity of accommodating tool, the clamping cavity of coaxially setting in the outer periphery of cylindrical cavity and the oil pressure pressurizing structure of intercommunication clamping cavity to control the hydraulic pressure in clamping cavity;Its characterized in that: the body includes the sleeve body fixed with machine tool chuck and the clamping body integrally formed in one end of sleeve body by 3D printing, the cylindrical cavity and clamping cavity are located in clamping body.

Description

Technical Field

[0001] This utility model relates to CNC machining tools, specifically a one-piece molded 3D printed hydraulic tool holder. Background Technology

[0002] A hydraulic tool holder is a CNC machining tool that achieves high-precision tool clamping based on the principle of hydraulic expansion. Its core principle is to drive the elastic element to deform uniformly through hydraulic oil pressure, so as to ensure that the tool remains stable during high-speed cutting.

[0003] CN201618866U discloses a "quick-lock hydraulic locking mechanism", which includes a body with a cylindrical cavity in the right half, a thin-walled cylindrical inner sleeve disposed in the cylindrical cavity, and a hydraulic pressurizing structure disposed on the body; a tubular clamping cavity is formed between the middle part of the outer circumferential surface of the inner sleeve and the inner circumferential surface of the cylindrical cavity; the right end of the outer circumferential surface of the inner sleeve is made into a stepped step, which is welded and fixed after fitting with the stepped hole of the body; the left end of the outer circumferential surface of the inner sleeve is directly welded and fixed to the body; an oil passage is also made on the body to connect the hydraulic pressurizing structure to the clamping cavity.

[0004] However, the above-mentioned mechanism is fixed by welding, which has the defects of reduced strength and sealing due to welding heat deformation, and the processing steps are numerous and the efficiency is low.

[0005] Therefore, it is of great significance to develop a one-piece molded 3D printed hydraulic tool holder that can solve the above problems. Utility Model Content

[0006] The purpose of this invention is to overcome the shortcomings in the above-mentioned background technology and provide an integrally molded 3D printed hydraulic tool holder. This tool holder has the function of high-precision clamping, as well as the advantages of high structural strength, excellent sealing performance and long service life.

[0007] The technical solution of this utility model is:

[0008] A one-piece 3D-printed hydraulic tool holder includes a body; the body has a cylindrical cavity for accommodating the tool, a clamping cavity coaxially disposed on the outer periphery of the cylindrical cavity, and a hydraulic pressurization structure communicating with the clamping cavity to control the hydraulic pressure within the clamping cavity; characterized in that: the body includes a sleeve fixed to a machine tool chuck and a clamping body integrally formed at one end of the sleeve by 3D printing, the cylindrical cavity and the clamping cavity being located within the clamping body.

[0009] The hydraulic pressurizing structure includes a hydraulic chamber disposed within the sleeve, an oil passage connecting the hydraulic chamber and the clamping chamber, and a sealing ring, a pin, and a pressurizing screw sequentially disposed within the hydraulic chamber; the sealing ring is used to pressurize the hydraulic oil, the pin is used to pressurize the sealing ring, and the pressurizing screw is threaded into the inner wall of the hydraulic chamber and is used to pressurize the pin.

[0010] The inner wall of the cylindrical cavity is provided with spiral grooves for discharging impurity particles.

[0011] The beneficial effects of this utility model are:

[0012] 1. The tool holder is divided into a sleeve made by turning and a clamping body 3D printed on the sleeve. Compared with the traditional welded tool holder, its weld-free structure can avoid the problems of weld leakage and stress concentration, giving the tool holder excellent sealing performance and mechanical strength.

[0013] 2. The cylindrical cavity for holding the tool and the clamping cavity are located in the clamping body and are integrally formed by 3D printing technology, which significantly improves the clamping accuracy, structural reliability and service life of the tool holder. Attached Figure Description

[0014] Figure 1 This is a schematic diagram (sectional view) of the main structure of this utility model.

[0015] Figure 2 yes Figure 1 An enlarged schematic diagram of the structure of part A.

[0016] Figure 3 yes Figure 1 A schematic diagram of the structure of the middle sleeve.

[0017] Figure 4 yes Figure 1 A schematic diagram of the structure of the middle clamp.

[0018] Figure 5 This is a schematic diagram (section view) of the existing technology's front view structure.

[0019] Figure 6 yes Figure 5 An enlarged schematic diagram of the structure of part B.

[0020] Figure 7 yes Figure 5 A schematic diagram of the structure of the main body.

[0021] Figure 8 yes Figure 5 A schematic diagram of the inner sleeve.

[0022] Figure label:

[0023] Body 1, sleeve 2, oil passage 2.1, clamping body 3, cylindrical cavity 3.1, clamping cavity 3.2, spiral groove 3.3, inner sleeve 4. Detailed Implementation

[0024] The present invention will be further described in detail below with reference to the embodiments shown in the accompanying drawings.

[0025] like Figures 1-4As shown, an integrally molded 3D printed hydraulic tool holder includes a body 1, which has a cylindrical cavity 3.1, a clamping cavity 3.2 and a hydraulic pressurization structure; these are all similar to the mechanism described in CN201618866U.

[0026] The improvement of this utility model is that the main body is formed by a sleeve 2 and a clamp 3 that are connected as one piece.

[0027] The left half of the main body is a sleeve for fixing to the machine tool chuck; the clamping body is fixed at the right end of the sleeve for holding the cutting tool; the clamping body is integrally formed at one end of the sleeve by 3D printing, and has a cylindrical cavity and a clamping cavity inside. The axis of the cylindrical cavity coincides with the axis of the machine tool chuck, and the inner wall of the cylindrical cavity has spiral grooves. When the cutting tool is inserted, the spiral grooves can discharge impurities adhering to the cutting tool; the clamping cavity surrounds the outer circumference of the cylindrical cavity and is filled with hydraulic oil. By changing the oil pressure in the clamping cavity, the inner wall of the cylindrical cavity undergoes slight contraction and deformation, thereby adjusting the clamping pressure of the inner wall of the cylindrical cavity on the cutting tool.

[0028] The sleeve is coaxially fixed to the machine tool chuck and is manufactured using a turning process. The sleeve contains the aforementioned hydraulic pressurization structure. The hydraulic pressurization structure includes a hydraulic chamber, an oil passage 2.1, a sealing ring, a pin, and a pressurizing screw. The hydraulic chamber is located within the sleeve, with one end connected to the oil passage. The oil passage is divided into two sections: one section is located within the sleeve and connects to the hydraulic chamber, while the other section extends into the chuck and connects to the clamping cavity. Hydraulic oil enters the clamping cavity through the hydraulic chamber and the oil passage. The sealing ring, pin, and pressurizing screw are sequentially arranged within the hydraulic chamber. The sealing ring seals the hydraulic chamber and pressurizes the hydraulic oil. By rotating the pressurizing screw, the pin and sealing ring are pushed sequentially, increasing the hydraulic pressure within the hydraulic chamber. The hydraulic oil within the hydraulic chamber is transmitted to the clamping cavity through the oil passage, pushing the inner wall of the clamping cavity to compress the inner wall of the cylindrical cavity, thereby causing a slight contraction deformation of the inner wall of the cylindrical cavity to clamp the tool.

[0029] like Figures 5-8 As shown, a hydraulic tool holder in the prior art (i.e., CN201618866U) includes a body 1 and an inner sleeve 4 inserted into the body. The body includes a cylindrical cavity 3.1, an oil passage 2.1 communicating with the cylindrical cavity, and a hydraulic pressurization structure communicating with the oil passage. A stepped hole is provided at the opening of the cylindrical cavity. The inner sleeve is inserted into the cylindrical cavity, and one end of the inner sleeve has an annular protrusion for welding after engaging with the stepped hole. Several grooves are provided on the outer circumferential surface of the inner sleeve, which fit against the inner circumferential surface of the cylindrical cavity to form a clamping cavity 3.2. The inner sleeve and the body are machined separately and heat-treated with high-temperature welding. The remaining weld seams are prone to stress concentration tearing, which leads to problems such as poor sealing reliability and reduced clamping accuracy.

[0030] Compared to traditional hydraulic tool holders, 3D printed hydraulic tool holders solve problems such as stress concentration tearing and insufficient sealing in welds, eliminate welding thermal deformation and have high clamping accuracy, while significantly improving the long-term stability and lifespan of hydraulic tool holders.

[0031] The accompanying drawings illustrate preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the present invention.

Claims

1. A one-piece molded 3D printed hydraulic tool holder, comprising a body (1); the body having a cylindrical cavity (3.1) for accommodating the tool, a clamping cavity (3.2) coaxially disposed on the outer periphery of the cylindrical cavity, and a hydraulic pressurization structure communicating with the clamping cavity to control the hydraulic pressure within the clamping cavity; characterized in that: The main body includes a sleeve (2) fixed to the machine tool chuck and a clamping body (3) integrally formed at one end of the sleeve by 3D printing, wherein the cylindrical cavity and the clamping cavity are located inside the clamping body.

2. The one-piece molded 3D printed hydraulic tool holder according to claim 1, characterized in that: The hydraulic pressurizing structure includes a hydraulic chamber disposed within the sleeve, an oil passage (2.1) connecting the hydraulic chamber and the clamping chamber, and a sealing ring, a pin, and a pressurizing screw disposed sequentially within the hydraulic chamber; the sealing ring is used to pressurize the hydraulic oil, the pin is used to pressurize the sealing ring, and the pressurizing screw is threaded into the inner wall of the hydraulic chamber and is used to pressurize the pin.

3. The one-piece molded 3D printed hydraulic tool holder according to claim 2, characterized in that: The inner wall of the cylindrical cavity is provided with spiral grooves (3.3) for discharging impurity particles.

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